CN100530784C - Double polar plate used for phosphoric acid type fuel cell and method for producing the same - Google Patents
Double polar plate used for phosphoric acid type fuel cell and method for producing the same Download PDFInfo
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- CN100530784C CN100530784C CNB2007101132597A CN200710113259A CN100530784C CN 100530784 C CN100530784 C CN 100530784C CN B2007101132597 A CNB2007101132597 A CN B2007101132597A CN 200710113259 A CN200710113259 A CN 200710113259A CN 100530784 C CN100530784 C CN 100530784C
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- Prior art keywords
- fuel cell
- phosphoric acid
- type fuel
- acid type
- plate used
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The present invention pertains to the field of new energy materials, in particular to a phosphate fuel cell bipolar plate and a preparation method. The phosphate fuel cell bipolar plate takes graphite as a conductive filler, carbon fiber as a reinforcer, the mixture of polyphenylene ether resin and fluorin resin as a binder; the quality percentage of each component is respectively 45-55 percents of graphite, 5-10 percents of carbon fiber, 30-40% of polyphenylene ether resin and 5-10 percents of fluorin resin. The preparation method adopts the one-time hot forming of die casting method with the pressure of 15-25MPa and the insulation time of 20-30min. The bipolar plate provided by the present invention has the advantages of high-temperature resistance, high thermal stability and good corrosion resistance. In addition, the present invention is somewhat hydrophobic, thus omitting hydrophobic materials and drainage in the battery; and has lubrication performance, which is conducive to demolding in the molding process and makes the waste bipolar plate material used repeatedly.
Description
Technical field
The invention belongs to the new energy materials field, particularly relate to a kind of double polar plate used for phosphoric acid type fuel cell and preparation method thereof.
Background technology
Phosphoric acid type fuel cell has that phosphoric acid is easy to get, reaction temperature and and advantage such as fuel source is wide, and become one of the most ripe fuel cell of research and development, be considered to the 4th kind of forms of electricity generation after firepower, water conservancy and nuclear energy.The performance of phosphoric acid type fuel cell bipolar plates and price directly influence the performance of battery pile, and be main at present with carbon plate, graphite (or carbon dust)-resin composite materials making.The mechanical strength of carbon plate material bipolar plates is low, porosity is high and the flow field processing difficulties, low and the pressurized operation seriously corroded of the heat resisting temperature of graphite-phenolic resin composite bipolar plate, cracking phenomena appears in the big and pressurized operation of the fragility of graphite-polyphenylene sulfide resin composite material bipolar plates.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provides that a kind of corrosion resistance is strong, heat resisting temperature is high and Heat stability is good, fragility is low and have double polar plate used for phosphoric acid type fuel cell of better hydrophobicity and greasy property and preparation method thereof.
The present invention realizes in the following manner:
A kind of double polar plate used for phosphoric acid type fuel cell, it is characterized in that being made up of graphite, carbon fiber, polyphenylene sulfide, fluororesin, the mass percent of each component is: graphite 45%～55%, carbon fiber 5%～10%, polyphenylene sulfide 30%～40%, fluororesin 5%～10%.Fluororesin is at least a in polytetrafluoroethylene, perfluoroethylene-propylene and the Meltability polytetrafluorethyletubular, with fluororesin instead of part polyphenylene sulfide, can solve the fragility problem of graphite-polyphenylene sulfide bipolar plates, increase the hydrophobic performance and the greasy property of graphite-polyphenylene sulfide bipolar plates; The interpolation carbon fiber is used to improve the anti-pressurized operation performance of graphite-polyphenylene sulfide bipolar plates.
The preparation method of above-mentioned double polar plate used for phosphoric acid type fuel cell is characterized in that may further comprise the steps:
1. according to the characteristics of double polar plate used for phosphoric acid type fuel cell, design flow field structure and processing mold, the control width of flow path and the degree of depth are 0.5～1.5mm;
2. selecting length is 10～200 μ m carbon fibers, adopts reflow method to carry out pre-activated in 65～68% red fuming nitric acid (RFNA) and handles, and cleans repeatedly with deionized water behind the 10～20h that refluxes and obtains the surface modification carbon fiber; All the other various raw materials are sieved, and the control granularity is 200～300 orders;
3. take by weighing various raw materials in proportion, adopt wet ball grinding that it is mixed, then through precipitation, filter, dry, obtain the powder-mixed raw material after sieving; The various raw materials that maybe will prepare adopt the blend extruding pelletization to obtain the particulate mixtures raw material;
4. according to thickness, area and the density of bipolar plates, take by weighing the dusty raw materials or the granular feedstock that mix;
5. the mould of the mixture material that weighs up being packed into, place heating furnace, the preforming of at first under 3～5MPa pressure, colding pressing, the speed with 3～5 ℃/min is warming up to 310～330 ℃ then, under constant temperature, apply the pressure of 15～25MPa, at last insulation, pressurize 20～30min;
6. from heating furnace, take out the mould that bipolar plates is housed, place running water to be cooled to room temperature rapidly, can reduce the degree of crystallinity of bipolar plates and the toughness of increase bipolar plates like this;
7. from mould, take out and promptly obtain double polar plate used for phosphoric acid type fuel cell.
This bipolar plates the key technical indexes: density 2.1～2.2g/cm
3Bending strength is greater than 40MPa; 220 ℃ of long-term heat resisting temperatures, heat-resisting 240 ℃ of short-term is not corroded medium-term and long-term use of 200～220 ℃ 85～100% SPAs; Conductivity is 100～250S.cm
-1(graphite-phenolic resins mold pressing bipolar plates is 25～200S.cm
-1, USDOE to the requirement of fuel battery double plates conductivity greater than 100S.cm
-1).The mark sheet of this bipolar plates is present: the one, and heat resisting temperature height and Heat stability is good; The 2nd, corrosion-resistant; The 3rd, have certain hydrophobicity, can save hydrophobic material and hydrophobic treatment in the battery; The 4th, have greasy property, in mold process, help the demoulding, help improving the precision of bipolar plates; The 5th, waste and old bipolar plate material can reuse.
Embodiment
Provide three most preferred embodiments of the present invention below:
Embodiment 1
According to the characteristics of double polar plate used for phosphoric acid type fuel cell, design flow field structure and processing mold, the control width of flow path is 1.0mm, flowing to the degree of depth is 1.0mm; Take by weighing graphite 450g, polyphenylene sulfide 400g, polytetrafluoroethylene 30g, perfluoroethylene-propylene 70g, carbon fiber 50g respectively, adopt wet ball grinding that it is mixed and obtain the powder-mixed raw material; Take by weighing the 105g mixture material and add mould, place heating furnace, the preforming of colding pressing under 5MPa pressure is warming up to 310 ℃ with the speed of 3 ℃/min, applies the pressure of 15MPa under constant temperature, keeps 30min under the constant temperature and pressure condition; Taking-up places running water to be cooled to room temperature rapidly from heating furnace, takes out from mould and obtains graphite-polyphenylene sulfide/fluororesin composite material bipolar plates.Bipolar plates is of a size of 100 * 100 * 5mm, and conductivity is 100～125S.cm
-1, density is 2.2g/cm
3, bending strength is greater than 40MPa, 220 ℃ of heat resisting temperatures, and the short-term heat resisting temperature is greater than 240 ℃.
Embodiment 2
Design flow field structure and processing mold, control width of flow path 1.5mm, flow channel depth is 1.0mm; Take by weighing graphite 550g, polyphenylene sulfide 300g, Meltability polytetrafluorethyletubular 30g, perfluoroethylene-propylene 50g, carbon fiber 70g respectively, adopt wet ball grinding that it is mixed and obtain the powder-mixed raw material; Take by weighing the 105g mixture material and add in the mould, place heating furnace, the preforming of colding pressing under 3MPa pressure is warming up to 330 ℃ with the speed of 5 ℃/min, applies the pressure of 25MPa under constant temperature, keeps 20min under the constant temperature and pressure condition; Taking-up places running water to be cooled to room temperature rapidly from heating furnace, takes out from mould and obtains graphite-polyphenylene sulfide/fluororesin composite material bipolar plates.Bipolar plates is of a size of 100 * 100 * 5mm, and conductivity is 150～250S.cm
-1, density is 2.1g/cm
3, all the other are with embodiment 1.
Embodiment 3
Design flow field structure and processing mold, the control width of flow path is 1.0mm, flow channel depth is 0.5mm; Take by weighing graphite 500g, polyphenylene sulfide 330g, Meltability polytetrafluorethyletubular 20g, perfluoroethylene-propylene 40g, polytetrafluoroethylene 10g, carbon fiber 100g respectively, adopt wet ball grinding that it is mixed and obtain the powder-mixed raw material; Take by weighing the 105g mixture material and add in the mould, place heating furnace, the preforming of colding pressing under 4MPa pressure is warming up to 320 ℃ with the speed of 4 ℃/min, applies the pressure of 20MPa under constant temperature, keeps 25min under constant temperature, constant-pressure conditions; Taking-up places running water to be cooled to room temperature rapidly from heating furnace, takes out from mould and obtains graphite-polyphenylene sulfide/fluororesin composite material bipolar plates.Bipolar plates is of a size of 100 * 100 * 5mm, and conductivity is 120～180S.cm
-1, density is 2.15g/cm
3, all the other are with embodiment 1.
Claims (3)
1. double polar plate used for phosphoric acid type fuel cell, it is characterized in that being made up of graphite, carbon fiber, polyphenylene sulfide, fluororesin, the mass percent of each component is: graphite 45%～55%, carbon fiber 5%～10%, polyphenylene sulfide 30%～40%, fluororesin 5%～10%.
2. double polar plate used for phosphoric acid type fuel cell according to claim 1 is characterized in that fluororesin is at least a in polytetrafluoroethylene, perfluoroethylene-propylene and the Meltability polytetrafluorethyletubular.
3. according to the preparation method of claim 1 or 2 described double polar plate used for phosphoric acid type fuel cell, it is characterized in that may further comprise the steps:
(a) according to the characteristics of double polar plate used for phosphoric acid type fuel cell, design flow field structure and processing mold, the control width of flow path and the degree of depth are 0.5～1.5mm;
(b) selecting length is 10～200 μ m carbon fibers, adopts reflow method to carry out pre-activated in 65～68% red fuming nitric acid (RFNA) and handles, and cleans repeatedly with deionized water behind the 10～20h that refluxes and obtains the surface modification carbon fiber; All the other various raw materials are sieved, and the control granularity is 200～300 orders;
(c) take by weighing various raw materials in proportion, adopt wet ball grinding that it is mixed, then through precipitation, filter, dry, obtain the powder-mixed raw material after sieving; The various raw materials that maybe will prepare adopt the blend extruding pelletization to obtain the particulate mixtures raw material;
(d), take by weighing the dusty raw materials or the granular feedstock that mix according to thickness, area and the density of bipolar plates;
(e) mixture material that weighs up is packed into mould, place heating furnace, the preforming of at first under 3～5MPa pressure, colding pressing, the speed with 3～5 ℃/min is warming up to 310～330 ℃ then, under constant temperature, apply the pressure of 15～25MPa, at last insulation, pressurize 20～30min;
(f) from heating furnace, take out the mould that bipolar plates is housed, place running water to be cooled to room temperature rapidly;
(g) taking-up promptly obtains double polar plate used for phosphoric acid type fuel cell from mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101132597A CN100530784C (en) | 2007-10-24 | 2007-10-24 | Double polar plate used for phosphoric acid type fuel cell and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101132597A CN100530784C (en) | 2007-10-24 | 2007-10-24 | Double polar plate used for phosphoric acid type fuel cell and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101174695A CN101174695A (en) | 2008-05-07 |
| CN100530784C true CN100530784C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101132597A Expired - Fee Related CN100530784C (en) | 2007-10-24 | 2007-10-24 | Double polar plate used for phosphoric acid type fuel cell and method for producing the same |
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| CN (1) | CN100530784C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK179150B1 (en) | 2016-10-19 | 2017-12-11 | Serenergy As | A fuel cell stack and its method of production, a separator plate in particular a bipolar plate, for a fuel cell and its production |
| CN110437589A (en) * | 2018-05-06 | 2019-11-12 | 祝飞 | A kind of carbon fibre composite and preparation method thereof for fuel battery double plates |
| DK180368B1 (en) * | 2019-08-14 | 2021-02-09 | Blue World Technologies Holding ApS | Method of producing separator plates |
| CN112993294A (en) * | 2019-12-14 | 2021-06-18 | 中国科学院大连化学物理研究所 | Carbon-plastic composite bipolar plate for fuel cell and preparation and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339322A (en) * | 1980-04-21 | 1982-07-13 | General Electric Company | Carbon fiber reinforced fluorocarbon-graphite bipolar current collector-separator |
-
2007
- 2007-10-24 CN CNB2007101132597A patent/CN100530784C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339322A (en) * | 1980-04-21 | 1982-07-13 | General Electric Company | Carbon fiber reinforced fluorocarbon-graphite bipolar current collector-separator |
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| CN101174695A (en) | 2008-05-07 |
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Granted publication date: 20090819 Termination date: 20121024 |